Questions tagged [clamp]

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votes
0answers
25 views

Ac dc 100a clamp meter reg

. This meter measures 9w led 0.039amps volts 230 I. E. 8.97watts. It is sinometer. Friends describe me the difference
5
votes
5answers
2k views

I am measuring a 9W LED with a clamp on ammeter. Why does it only draw 7.62W?

I bought a UNI T UT210E true rms multimeter. I measured the current of 9 W LED lamp. It shows 0.033A. For the power I get \$0.033 A \cdot 220 V = 7.26 W\$ only. ...
0
votes
0answers
33 views

simple clamp circuit resistor calculation

Hello guys i want to calculate the resistor R in this circuit.Can anybody help me? The value of zener diode(VZ)=4.8 volt. well i try to simplify it My question is is my solution is right??If not ...
1
vote
2answers
130 views

TL431 / TLV431 supercapacitor voltage clamping circuit

I have a question regarding a circuit I've been working on for some time. The circuit is based around existing supercapacitor protection modules and uses a TL431 (actually a TLV431 lower power ...
2
votes
1answer
64 views

Clamp a D/A to prevent output below 0V

I am using a USB D/A converter to drive a high-voltage op-amp with a signal between 0 and 3V at 10 kHz. The D/A I am using is capable of outputting between -10 and +10 and unfortunately seems to ...
7
votes
1answer
156 views

Why is a clamp meter unaffected by nearby wires?

I understand a clamp meter works by measuring the magnetic field generated by current flowing through a wire. It's well known that clamping 2 wires carrying the same current in opposite directions ...
0
votes
1answer
78 views

How to scale +15v/-15v signal to +10v/-5v?

I have a control voltage signal of an audio synthesizer that goes from +15v to -15v and I want to scale it into +10v to -5v. I want to scale its range. How can I do that? I guess a way to do it ...
2
votes
1answer
85 views

Looking for a 15kV Zener - or equivalent circuitry

I have a high frequency high voltage module that puts out about 15kV (not the stun gun modules sold on eBay). Because of the circuit design the transformer is damaged if it does not arc over. I am ...
1
vote
2answers
78 views

Clipping an AC line voltage

I've got a linear step-up transformer (120V AC input) which has an output that under load nominally supplies 230V AC @ 100mA. But with no load it floats to as high as 280 V. I need to switch the load ...
3
votes
0answers
126 views

How to select a diode for baker clamp?

What are the requirements when selecting a diode for baker clamp circuit? 1- for example, How the reverse leaking current of the diode affects the circuit? can a diode with relatively high reverse ...
0
votes
1answer
54 views

During DC restoration of a video signal how is the first sync pulse detected?

DC restoration of an AC coupled video signal can be performed by clamping to some reference voltage, during the horizontal sync periods of the video. This all seems fine in a running system, when the ...
0
votes
1answer
61 views

Is this current clamp meter measuring correct according to its specs?

A 24V DC power supply is supplying around 2.4A to a pure resistive load. The input voltage is 230Vrms. So I estimated the rms current drawn from the power network as: P/230 = (24*2.4)/230 = 250mA. ...